DE102018212751A1 - Method and device for temperature control in the exhaust tract of an internal combustion engine - Google Patents
Method and device for temperature control in the exhaust tract of an internal combustion engine Download PDFInfo
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- DE102018212751A1 DE102018212751A1 DE102018212751.4A DE102018212751A DE102018212751A1 DE 102018212751 A1 DE102018212751 A1 DE 102018212751A1 DE 102018212751 A DE102018212751 A DE 102018212751A DE 102018212751 A1 DE102018212751 A1 DE 102018212751A1
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- temperature
- temperature control
- catalytic converter
- nox storage
- particle filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/04—Exhaust treating devices having provisions not otherwise provided for for regeneration or reactivation, e.g. of catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0408—Methods of control or diagnosing using a feed-back loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1602—Temperature of exhaust gas apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
Die Erfindung betrifft ein Verfahren zur Temperaturregelung im Abgastrakt einer Brennkraftmaschine, in welchem mehrere Katalysatoren angeordnet sind, wobei zur Temperaturregelung mindestens zwei Temperaturregelkreise verwendet werden. Des Weiteren betrifft die Erfindung eine Vorrichtung zur Temperaturregelung im Abgastrakt einer Brennkraftmaschine.The invention relates to a method for temperature control in the exhaust tract of an internal combustion engine, in which a plurality of catalysts are arranged, at least two temperature control circuits being used for temperature control. Furthermore, the invention relates to a device for temperature control in the exhaust tract of an internal combustion engine.
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Temperaturregelung im Abgastrakt einer Brennkraftmaschine.The invention relates to a method and a device for temperature control in the exhaust tract of an internal combustion engine.
Im Rahmen der Abgasnachbehandlung im Abgastrakt einer Brennkraftmaschine werden heute verschiedene Katalysatoren eingesetzt, beispielsweise ein Partikelfilter, ein NOx-Speicherkatalysator, ein Dreiwegekatalysator, ein Diesel-Oxidationskatalysator oder ein SCR-Katalysator. Diese Katalysatoren arbeiten nur dann optimal, wenn eine von der Beschichtung des jeweiligen Katalysators abhängige Temperatur eingestellt ist. Des Weiteren besteht bei bestimmten Katalysatoren die Notwendigkeit einer periodischen Regeneration, beispielsweise einer Partikelfilterregeneration oder einer Desulfatisierung. Zur Durchführung der jeweiligen Regeneration ist es notwendig, eine bestimmte, beschichtungsabhängige Temperatur einzustellen, die sich von der im Normalbetrieb herrschenden Temperatur unterscheidet, und diese Temperatur für die Dauer der Regeneration stabil zu halten.Various catalysts are used today in the exhaust gas aftertreatment in the exhaust tract of an internal combustion engine, for example a particle filter, a NOx storage catalytic converter, a three-way catalytic converter, a diesel oxidation catalytic converter or an SCR catalytic converter. These catalysts only work optimally when a temperature dependent on the coating of the respective catalyst is set. Furthermore, with certain catalysts there is a need for periodic regeneration, for example particle filter regeneration or desulfation. To carry out the respective regeneration, it is necessary to set a specific, coating-dependent temperature which differs from the temperature prevailing in normal operation and to keep this temperature stable for the duration of the regeneration.
Es ist bereits bekannt, im Abgastrakt einer Brennkraftmaschine einen NOx-Speicherkatalysator, ein Partikelfilter und einen SCR-Katalysator in Reihe hintereinander anzuordnen. Im NOx-Speicherkatalysator werden im Abgasstrom enthaltene Stickoxidkomponenten zurückgehalten. Der Partikelfilter ist zum Zurückhalten von Rußpartikeln vorgesehen. Im SCR-Katalysator findet eine selektive katalytische Reduktion statt. Dazu wird stromauf des SCR-Katalysators eine wässrige Harnstofflösung in den Abgasstrang eingespritzt, um die im Abgas enthaltenen Stickoxide wieder zu Stickstoff zu reduzieren.It is already known to arrange a NOx storage catalytic converter, a particle filter and an SCR catalytic converter in series in the exhaust tract of an internal combustion engine. Nitrogen oxide components contained in the exhaust gas stream are retained in the NOx storage catalytic converter. The particle filter is designed to retain soot particles. A selective catalytic reduction takes place in the SCR catalytic converter. For this purpose, an aqueous urea solution is injected into the exhaust line upstream of the SCR catalytic converter in order to reduce the nitrogen oxides contained in the exhaust gas back to nitrogen.
Zum Einstellen der Temperatur für die jeweilige Katalysatorregeneration wird heute typischerweise ein Temperaturregelkreis verwendet. Dabei wird auf ausschließlich einen im Abgasstrang angeordneten Temperatursensor geregelt. Durch das Einstellen von verschiedenen Temperatursollwerten auf diesem Regelpunkt wird die jeweils einzustellende Temperatur im jeweiligen Katalysator erreicht. Ein Nachteil dieser Vorgehensweise besteht darin, dass vom verwendeten Regelpunkt aus durch eine aufwendige Umrechnung vor- oder zurückgerechnet werden muss, um in einem stromauf oder stromab des Regelpunktes angeordneten Katalysator eine Regeneration durchführen zu können.A temperature control loop is typically used today to set the temperature for the respective catalyst regeneration. Thereby, only one temperature sensor arranged in the exhaust line is regulated. By setting different temperature setpoints at this control point, the temperature to be set in each catalyst is reached. A disadvantage of this procedure is that the control point used must be precalculated or recalculated by a complex conversion in order to be able to carry out regeneration in a catalytic converter arranged upstream or downstream of the control point.
Sind beispielsweise im Abgastrakt einer Brennkraftmaschine in Reihe hintereinander ein NOx-Speicherkatalysator, ein Partikelfilter und ein SCR-Katalysator angeordnet und wird als Regelpunkt ein zwischen dem NOx-Katalysator und dem Partikelfilter angeordneter Temperatursensor verwendet, dann muss von diesem Regelpunkt aus stromauf zurückgerechnet werden, um eine im NOx-Speicherkatalysator benötigte Temperatur einzustellen, und von diesem Regelpunkt aus stromab vorwärtsgerechnet werden, um eine im Partikelfilter benötigte Temperatur einzustellen.If, for example, a NOx storage catalytic converter, a particle filter and an SCR catalytic converter are arranged in series in the exhaust tract of an internal combustion engine and if a temperature sensor arranged between the NOx catalytic converter and the particle filter is used as the control point, upstream calculation must be carried out from this control point in order to set a temperature required in the NOx storage catalytic converter, and from this control point are calculated downstream in order to set a temperature required in the particle filter.
Die Aufgabe der Erfindung besteht darin, ein Verfahren und eine Vorrichtung anzugeben, bei denen die Einstellung der jeweiligen Temperatur verbessert ist.The object of the invention is to provide a method and a device in which the setting of the respective temperature is improved.
Diese Aufgabe wird durch ein Verfahren mit den im Anspruch 1 angegebenen Merkmalen gelöst. Gemäß diesem Verfahren zur Temperaturregelung im Abgastrakt einer Brennkraftmaschine, in welchem mehrere Katalysatoren angeordnet sind, werden zur Temperaturregelung mindestens zwei Temperaturregelkreise verwendet. Des Weiteren wird die genannte Aufgabe durch eine Vorrichtung zur Temperaturregelung im Abgastrakt einer Brennkraftmaschine, in welchem mehrere Katalysatoren angeordnet sind, gelöst, welche mindestens zwei Temperaturregelkreise enthält.This object is achieved by a method with the features specified in
Die Vorteile der Erfindung bestehen insbesondere darin, dass durch die in den unabhängigen Patentansprüchen angegebenen Merkmale eine effiziente Regeneration des jeweiligen Katalysators erfolgt, da die vom jeweiligen Katalysator benötigte Temperatur präziser eingestellt werden kann als bei bekannten Verfahren. Ein weiterer Vorteil besteht darin, dass eine genauere Abstimmung des Gesamtsystems erfolgt, da keine Umrechnung von Sollwerttemperaturen von einem verwendeten Regelpunkt auf eine jeweils andere im Abgastrakt stromauf oder stromab liegende Position vorgenommen werden muss.The advantages of the invention consist in particular in that the features specified in the independent patent claims result in efficient regeneration of the respective catalyst, since the temperature required by the respective catalyst can be set more precisely than in known processes. A further advantage is that the overall system is tuned more precisely, since there is no need to convert setpoint temperatures from one control point used to another position upstream or downstream in the exhaust tract.
Weitere Vorteile der Erfindung ergeben sich aus deren beispielhafter Erläuterung anhand der
Diese zeigt eine Vorrichtung zur Temperaturregelung im Abgastrakt einer Brennkraftmaschine, in welchem mehrere Katalysatoren angeordnet sind. Diese Vorrichtung enthält eine Brennkraftmaschine
Des Weiteren weist die in der
Dem ersten Regler
Des Weiteren wird dem ersten Regler
Im ersten Regler
Der erste Temperaturregelkreis, zu welchem außer dem ersten Regler
Zu dieser Desulfatisierung des NOx-Speicherkatalysators
Nach Beendigung der Desulfatisierung des NOx-Speicherkatalysators 3 wird der erste Temperaturregelkreis von der Steuereinheit
Dem zweiten Regler
Des Weiteren wird dem zweiten Regler
Im zweiten Regler
Der zweite Temperaturregelkreis, zu welchem außer dem zweiten Regler
Zu dieser Partikelfilterregeneration des Partikelfilters
Nach Beendigung der Regeneration des Partikelfilters
Zum Erkennen der Notwendigkeit einer Regeneration des Partikelfilters
Dem dritten Regler
Des Weiteren wird dem dritten Regler
Im dritten Regler
Der dritte Temperaturregelkreis, zu welchem außer dem dritten Regler
Zu dieser schnellen Erwärmung des SCR-Katalysators
Nach Beendigung der schnellen Aufwärmung des SCR-Katalysators
Wie oben beschrieben ist, werden die drei Temperaturregelkreise von der Steuereinheit
Bei dem oben anhand der
Bei allen vorstehend genannten Ausführungsbeispielen wird die vom jeweiligen Katalysator benötigte Solltemperatur an der richtigen Position zur richtigen Zeit exakt eingestellt. Dies ermöglicht eine effiziente Regeneration des jeweiligen Katalysators durch eine präzise Einstellung der jeweils erforderlichen Temperatur.In all of the above-mentioned exemplary embodiments, the target temperature required by the respective catalytic converter is set exactly at the right position at the right time. This enables efficient regeneration of the respective catalyst by precisely setting the required temperature.
Oben wurde beschrieben, dass die von den Reglern
Claims (18)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE102018212751.4A DE102018212751A1 (en) | 2018-07-31 | 2018-07-31 | Method and device for temperature control in the exhaust tract of an internal combustion engine |
PCT/EP2019/063401 WO2020025185A1 (en) | 2018-07-31 | 2019-05-23 | Method and device for controlling the temperature in the exhaust gas tract of an internal combustion engine |
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DE102018212751.4A DE102018212751A1 (en) | 2018-07-31 | 2018-07-31 | Method and device for temperature control in the exhaust tract of an internal combustion engine |
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DE102018212751A1 true DE102018212751A1 (en) | 2020-02-06 |
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DE102018212751.4A Withdrawn DE102018212751A1 (en) | 2018-07-31 | 2018-07-31 | Method and device for temperature control in the exhaust tract of an internal combustion engine |
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WO (1) | WO2020025185A1 (en) |
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CN114991910B (en) * | 2022-03-30 | 2024-03-19 | 潍柴动力股份有限公司 | Control method and device of engine aftertreatment system and electronic equipment |
Citations (1)
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DE112008003421B4 (en) * | 2007-12-20 | 2016-02-04 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Regeneration system and method for exhaust aftertreatment devices |
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DE102005015479A1 (en) * | 2005-04-05 | 2006-10-12 | Daimlerchrysler Ag | Device for treating exhaust gases from internal combustion (IC) engine, e.g. direct injection diesel engine, cools down selective catalytic reduction (SCR) catalyst as function of exhaust gas temperature |
DE102006034805A1 (en) * | 2006-07-27 | 2008-01-31 | Robert Bosch Gmbh | Diesel particulate filter regenerating and nitrogen oxide storage catalyst desulphurizing method for internal combustion engine, involves triggering combined complete or partial regeneration of filter and desulphurization of catalyst |
JP2010511838A (en) * | 2006-12-05 | 2010-04-15 | マック トラックス インコーポレイテッド | Engine having exhaust cooling and method thereof |
US9382829B2 (en) * | 2014-10-21 | 2016-07-05 | Toyota Motor Engineering & Manufacturing North America, Inc. | Bypass exhaust pathway to allow gases to bypass the start catalyst of a vehicle |
JP2016145532A (en) * | 2015-02-06 | 2016-08-12 | いすゞ自動車株式会社 | Exhaust emission control system for internal combustion engine, internal combustion engine and exhaust emission control method for internal combustion engine |
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2018
- 2018-07-31 DE DE102018212751.4A patent/DE102018212751A1/en not_active Withdrawn
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2019
- 2019-05-23 WO PCT/EP2019/063401 patent/WO2020025185A1/en active Application Filing
Patent Citations (1)
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DE112008003421B4 (en) * | 2007-12-20 | 2016-02-04 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Regeneration system and method for exhaust aftertreatment devices |
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